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Genentech Announces October 6 Webcast Discussion of Earnings and Other Business Results

South San Francisco, Calif. -- September 15, 2004 --

Genentech, Inc. (NYSE: DNA) will announce its 2004 3rd quarter earnings on Wednesday, October 6, 2004, after the markets close.

The announcement will be followed by a live webcast at 2:15 p.m. Pacific Time of a discussion by Genentech management of the earnings and other business results. The webcast can be accessed on Genentech's web site at http://www.gene.com and will be archived and available for replay until 5:00 p.m. Pacific Time on October 20, 2004.

An audio replay of the webcast will be available beginning at 5:15 p.m. Pacific Time on October 6, 2004 through 5:15 p.m. Pacific Time on October 13, 2004. Access numbers for this replay are: 1-800-642-1687 (U.S./Canada) and 1-706-645-9291 (international); Conference ID number is 128648.

About Genentech
Genentech is a leading biotechnology company that discovers, develops, manufactures and commercializes biotherapeutics for significant unmet medical needs. A considerable number of the currently approved biotechnology products originated from or are based on Genentech science. Genentech manufactures and commercializes multiple biotechnology products directly in the United States and licenses several additional products to other companies. The company has headquarters in South San Francisco, California and is traded on the New York Stock Exchange under the symbol DNA. For press releases and additional information about the company, please visit http://www.gene.com.